CN110860747A - Electrode clamp for deep small hole electric spark forming machining and machining method - Google Patents

Electrode clamp for deep small hole electric spark forming machining and machining method Download PDF

Info

Publication number
CN110860747A
CN110860747A CN201911162899.6A CN201911162899A CN110860747A CN 110860747 A CN110860747 A CN 110860747A CN 201911162899 A CN201911162899 A CN 201911162899A CN 110860747 A CN110860747 A CN 110860747A
Authority
CN
China
Prior art keywords
electrode
machining
clamp
electric spark
sleeve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911162899.6A
Other languages
Chinese (zh)
Inventor
孙超
崔海军
翟士民
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AVIC Beijing Aeronautical Manufacturing Technology Research Institute
AVIC Manufacturing Technology Institute
Original Assignee
AVIC Beijing Aeronautical Manufacturing Technology Research Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AVIC Beijing Aeronautical Manufacturing Technology Research Institute filed Critical AVIC Beijing Aeronautical Manufacturing Technology Research Institute
Priority to CN201911162899.6A priority Critical patent/CN110860747A/en
Publication of CN110860747A publication Critical patent/CN110860747A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23HWORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H9/00Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
    • B23H9/14Making holes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23HWORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H1/00Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23HWORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H11/00Auxiliary apparatus or details, not otherwise provided for

Abstract

The invention relates to an electrode clamp for deep small hole electric spark forming machining and a machining method. The electrode clamp comprises an electrode clamp body, a locking sealing plug, a locking sleeve, a positioning transition sleeve and a hollow electrode; coaxial electrode guide channels are arranged on the locking sealing plug, the locking sleeve and the positioning transition sleeve; one end of the electrode clamp body is provided with a groove structure, a locking sealing plug is plugged into the groove structure, the other end of the electrode clamp body is connected with electric spark forming processing equipment, and an oil flushing channel is arranged in an inner cavity of the electrode clamp body; the positioning transition sleeve is connected with one end of the electrode clamp body, which is positioned in the groove, and the positioning transition sleeve is connected with the locking sleeve; the hollow electrode sequentially penetrates through the positioning transition sleeve, the locking sleeve and the pole guide channel of the locking sealing plug and then extends into the oil filling channel of the electrode clamp body. The invention solves the problems that the chip removal is difficult due to the lack of oil flushing of the electrode and the machining efficiency is influenced because the electrode is not easy to replace.

Description

Electrode clamp for deep small hole electric spark forming machining and machining method
Technical Field
The invention relates to the technical field of electric spark machining, in particular to an electrode clamp for deep small hole electric spark forming machining and a machining method.
Background
The electric spark machining is one of special machining technologies, mainly utilizes the high-temperature ablation phenomenon generated during non-contact pulsed electric spark discharge between a tool and a workpiece (a positive electrode and a negative electrode) to remove redundant metal on the workpiece so as to achieve the purpose of machining and forming, and is widely applied to machining of various difficult-to-cut materials and complex characteristic structures. At present, a large number of military and civil parts are designed by adopting a densely distributed deep small hole structure, for example, parts such as a flame tube of a combustion chamber of an aircraft engine, a turbine blade and the like, the deep small holes are densely distributed on a complex space molded surface, the number is large, the requirements on position degree and size precision are high, part of the deep small holes are involved in position interference, and the conventional process method cannot process the parts, so that the problems need to be solved by adopting an electric spark processing technology.
For the electric spark machining of a deep small hole structure, two common technical methods are available at present: the first is a high-speed small hole processing method, and the second is an electric spark forming processing method.
The high-speed small hole processing method adopts a hollow copper electrode penetrating through a wire guide nozzle, the electrode rotates at a high speed and feeds along the axial direction, and oil is flushed in the center, so that the purpose of hole making is achieved, the processing efficiency is high, but the technology has the following defects: (1) at present, the hole making precision of a domestic high-speed small hole machine is relatively poor, and the deeper the hole, the worse the precision; (2) the recasting layer is thick, the surface roughness is poor, and irregular microcracks are easy to generate; (3) the electrode loss is large and the cost is high; (4) compared with electric spark forming processing, the high-speed small hole processing method has the advantages that the process parameter searching difficulty is high, interference holes are difficult to process, and the application range is limited.
The electric spark forming process generally adopts a non-rotating solid electrode, and holes are manufactured by single-shaft or multi-shaft linkage feeding, so that the method has the technical advantages of high precision and stability, good surface quality, low cost, suitability for synchronous processing of interference holes and grouped holes and the like, overcomes the defects of a high-speed small hole processing technology, has a good application prospect, and simultaneously has the following defects: (1) the electrode clamping mode is simple, one end of the electrode is clamped on a main shaft or other mounting seats, the electrode is fixed in use length, the electrode is weak in rigidity and cannot be used as a long electrode, but if the electrode is short in length, the electrode is frequently replaced, and the machining efficiency and consistency are affected, so that a plurality of limiting conditions exist in the electrode use, and the purpose of high-efficiency, high-precision and high-stability hole making is not facilitated; (2) the electrode clamping is lack of an effective oil flushing mode, so that chip removal is difficult, particularly for deep small holes, abnormal discharge proportion such as secondary discharge is greatly increased, machining efficiency is reduced, defects such as taper holes are easy to generate, and the surface quality is poor.
In summary, the conventional clamping method for hole-making electrodes based on the electrical discharge machining technology has the problem that it is difficult to solve, and is not suitable for machining a dense group hole structure, so how to provide a new machining method for an electrode clamp to solve the above technical problems is a technical problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
(1) Technical problem to be solved
The first aspect of the embodiment of the invention provides an electrode clamp for deep small hole electric spark forming machining. The locking sealing plug, the locking sleeve and the positioning transition sleeve are all provided with coaxial electrode guide channels, and the electrode clamp body is internally provided with an oil flushing channel, so that the problems that chip removal is difficult and electrode clamping is difficult to replace due to the lack of an effective oil flushing mode in electrode clamping in the prior art, and the machining efficiency and result consistency are affected are solved.
The second aspect of the embodiment of the invention provides a deep small hole electric spark forming machining method. By adopting the electrode clamp of the first aspect of the embodiment of the invention, the processing flow is simplified, and the efficiency is improved.
(2) Technical scheme
In a first aspect, an embodiment of the present invention provides an electrode fixture for deep small hole electrical discharge machining, including: the electrode clamp comprises an electrode clamp body, a locking sealing plug, a locking sleeve, a positioning transition sleeve and a hollow electrode; the locking sealing plug, the locking sleeve and the positioning transition sleeve are all provided with coaxial electrode guide channels; one end of the electrode clamp body is provided with a groove structure, the locking sealing plug is plugged into the groove structure, the other end of the electrode clamp body is connected with electric spark forming machining equipment, and an oil flushing channel is arranged in an inner cavity of the electrode clamp body; the positioning transition sleeve is connected with one end of the electrode clamp body, which is positioned in the groove, and the positioning transition sleeve is connected with the locking sleeve; the hollow electrode sequentially penetrates through the positioning transition sleeve, the locking sleeve and the pole guide channel of the locking sealing plug and then extends into the oil filling channel of the electrode clamp body.
Further, an oil pipe interface is further arranged on the electrode clamp body and connected with an oil flushing pipe of the electric spark forming machining equipment.
Further, the oil pipe interface is of an internal thread structure.
Further, the locking sealing plug is made of oil-resistant rubber.
Furthermore, the locking sealing plug is of a conical structure, and the tip of the conical structure is plugged into the groove of the electrode clamp body; the bottom end of the conical structure is abutted against the locking sleeve.
Further, the locking sleeve is connected with the electrode clamp body through threads.
Furthermore, a convex positioning block structure used for positioning the hollow electrode is arranged on the positioning transition sleeve.
Further, the electrode fixing device further comprises an electrode fixing block, wherein the electrode fixing block is connected with the positioning transition sleeve through a screw and used for fixing the hollow electrode.
In a second aspect, a deep small hole electric spark forming processing method is provided, which includes:
sequentially penetrating the hollow electrode through the electrode guide channel and extending into an oil flushing channel of the electrode clamp body, clamping the electrode clamp body on electric spark forming machining equipment, and communicating an oil flushing pipe with the oil flushing channel of the electrode clamp body;
secondly, accurately positioning the hollow electrode to a machining position through the positioning transition sleeve, calling a machining program and parameters for setting electric spark forming machining equipment, simultaneously setting oil flushing pressure of an oil flushing pipe, opening an oil flushing valve of the oil flushing pipe, and starting the electric spark forming machining equipment to realize forming machining of central oil flushing of the hollow electrode;
and step three, when the length loss of the hollow electrode is large, pulling the hollow electrode to a specified extension length along the length direction of the guide channel, and repeating the step two to continue processing.
Further, before the hollow electrode is pulled to the specified extension length, the electrode fastening block connected to one end of the positioning transition sleeve is loosened; the electrode fastening block should be tightened after the hollow electrode is pulled to a specified extension length.
(3) Advantageous effects
In conclusion, the oil flushing channel is arranged in the electrode clamp body and is connected with the oil flushing pipe, the oil flushing channel is introduced into the hollow electrode to realize central oil flushing, dust in the machining process can be brought out along with oil in time, and 'stubborn diseases' of poor chip removal in the deep small hole electric spark forming machining process in the prior art are solved, so that the probability of abnormal discharge such as secondary discharge and the like caused by the dust is greatly reduced, the deep small hole machining efficiency is improved, and the machining quality is improved;
meanwhile, the electrode guide channel is sequentially arranged on the locking sealing plug, the locking sleeve and the positioning transition sleeve, so that the quick replacement, flexible adjustment and movement of the hollow electrode can be realized, the reasonable working length of the hollow electrode can be always kept in the porous machining process through the adaptive adjustment of the position of the hollow electrode along the machining direction, and the compensation of loss in the machining process of the hollow electrode is realized, so that the replacement frequency of the hollow electrode is reduced, the production preparation time is saved, and the production efficiency is improved;
in addition, because the frequency of replacing the hollow electrode is reduced, the error caused by replacing the hollow electrode is greatly reduced, and the consistency of the obtained processing result is better; finally, due to the coaxial design of the electrode guide channels on the locking sealing plug, the locking sleeve and the positioning transition sleeve, the accurate oil flushing of the center of the hollow electrode 1 can be ensured, the phenomenon that the unstable oil flushing in the lateral direction interferes with the chip removal process of the oil flushing of the center of the hollow electrode is avoided, and the processing effect can be further improved.
In addition, the deep small hole electric spark forming machining method provided by the invention has the advantages of simplicity, easiness in operation, high machining efficiency and good consistency of machining results.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural view of an electrode holder according to a first embodiment of the first aspect of the present invention.
Fig. 2 is a flow chart of the deep small hole electric spark forming machining method according to the first aspect of the invention.
In the figure: the electrode clamp comprises a hollow electrode 1, an electrode fastening block 2, a positioning transition sleeve 3, a locking sleeve 4, a locking sealing plug 5 and an electrode clamp body 6.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention and are not intended to limit the scope of the invention, i.e., the invention is not limited to the embodiments described, but covers any modifications, alterations, and improvements in the parts, components, and connections without departing from the spirit of the invention.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail with reference to the accompanying drawings 1-2, in conjunction with an embodiment.
Referring to fig. 1, an electrode holder for deep small hole electric spark forming processing according to a first aspect of the embodiment of the present invention includes an electrode holder body 6, a locking sealing plug 5, a locking sleeve 4, a positioning transition sleeve 3, and a hollow electrode 1. Wherein the locking sealing plug 5, the locking sleeve 4 and the positioning transition sleeve 3 are all provided with coaxial electrode guide channels; one end of the electrode clamp body 6 is provided with a groove structure, the locking sealing plug 5 is plugged into the groove structure, the other end of the electrode clamp body 6 is connected with electric spark forming processing equipment, and an oil flushing channel is arranged in an inner cavity of the electrode clamp body 6; the positioning transition sleeve 3 is connected with one end of the electrode clamp body 6 close to the groove, and the positioning transition sleeve 3 is connected with the locking sleeve 4; the hollow electrode 1 sequentially passes through the electrode guide channels of the positioning transition sleeve 3, the locking sleeve 4 and the locking sealing plug 5 and then extends into the oil filling channel of the electrode clamp body 6.
In the embodiment of the invention, one end of the electrode clamp body 6 is installed on the electric spark forming processing equipment, and specifically, as shown in fig. 1, the right end of the electrode clamp body 6 is connected to the main shaft of the electric spark forming processing equipment; the left end of the electrode clamp body 6 is provided with a groove structure, and the groove structure is mainly used for plugging the locking sealing plug 5, so that the oil filling channel is blocked by the locking sealing plug 5, and oil in the inner cavity of the electrode clamp body 6 is prevented from overflowing; in the embodiment of the invention, the locking sleeve 4 is connected with the electrode clamp body 6, the locking sealing plug 5 can be plugged into the groove structure by the locking sleeve 4 in the connection process of the locking sleeve 4 and the electrode clamp body 6, the purpose of blocking an oil filling channel is realized, the positioning transition sleeve 3 is arranged on one side of the locking sleeve 4, the positioning transition sleeve 3 provides a positioning position for the hollow electrode 1 to extend into the electrode guide channel, the hollow electrode 1 is prevented from extending too long or too short, the extending length is uniform, and the electric spark forming processing is facilitated.
Because the coaxial electrode guide channels are arranged in the length directions of the positioning transition sleeve 3, the locking sleeve 4 and the locking sealing plug 5, the hollow electrode 1 sequentially passes through the electrode guide channels of the transition sleeve 3, the locking sleeve 4 and the locking sealing plug 5 and then extends into the oil filling channel of the electrode clamp body 6. Therefore, the coaxial design of the electrode guide channel can ensure that the hollow electrode 1 can sequentially pass through the positioning transition sleeve 3, the locking sleeve 4 and the locking sealing plug 5, and the problem that the electrode guide channel on the positioning transition sleeve 3, the locking sleeve 4 and the locking sealing plug 5 cannot smoothly pass through when the electrode guide channel is not coaxial is avoided. Meanwhile, the positioning transition sleeve 3, the locking sleeve 4 and the locking sealing plug 5 in the embodiment of the invention cover the hollow electrode 1, and can also play a certain role in fixing the hollow electrode 1.
Before actual use, the hollow electrode 1 sequentially passes through the positioning transition sleeve 3, the locking sleeve 4 and the locking sealing plug 5 and extends into an oil filling channel of the electrode clamp body 6, and the hollow electrode 1 is ensured to have proper length in the oil filling channel. Subsequently, the locking sleeve 4 is fastened, the locking sealing plug 5 can be firmly plugged into the groove of the electrode clamp body 6 through the locking sleeve 4, oil in an oil flushing channel in the working process is ensured not to overflow from the groove, and the plugged locking sealing plug 5 can also play a certain role in fixing the hollow electrode 1. And then, after the length of the hollow electrode 1 in the oil flushing channel is adjusted, the positioning transition sleeve 3 is firmly connected with the locking sleeve 4. It should be noted here that when the length of the hollow electrode 1 is adjusted to the machining position on the positioning transition sleeve 3, the length of the hollow electrode 1 in the oil flushing channel is appropriate, and the hollow electrode is suitable for the electric spark forming machining operation. And finally, connecting the right end of the electrode clamp body 6 with electric spark forming machining equipment, and connecting an oil flushing pipe to an oil flushing channel of the electrode clamp body 6.
During actual work, firstly, a machining program and parameters for setting the electric spark forming machining equipment are taken, meanwhile, the oil flushing pressure of the oil flushing pipe is set, an oil flushing valve of the oil flushing pipe is opened, and the electric spark forming machining equipment is started to realize the forming machining operation of central oil flushing of the hollow electrode 1; in the process of machining operation, when the length loss of the hollow electrode 1 is large, the hollow electrode 1 is pulled to a specified extension length along the length direction of the guide channel, and then the electric spark forming machining equipment is started to continue machining.
In the embodiment of the invention, the oil flushing channel is arranged in the electrode clamp body 6 and is connected with the oil flushing pipe, the oil flushing channel is introduced into the hollow electrode 1 to realize central oil flushing, so that dust in the machining process can be brought out along with oil in time, and 'stubborn diseases' of bad chip removal in the deep small hole electric spark forming machining process in the prior art are solved, thereby greatly reducing the probability of abnormal discharge such as secondary discharge and the like caused by the dust, improving the deep small hole machining efficiency and improving the machining quality; meanwhile, in the embodiment of the invention, the electrode guide channels are sequentially arranged on the locking sealing plug 5, the locking sleeve 4 and the positioning transition sleeve 3, so that the hollow electrode 1 can be quickly replaced, flexibly adjusted and moved, and the reasonable working length of the hollow electrode 1 can be always kept in the porous processing process through the adaptive adjustment of the position of the hollow electrode 1 along the processing direction, so that the loss compensation in the processing process of the hollow electrode 1 is realized, the replacement frequency of the hollow electrode 1 is reduced, the production preparation time is saved, and the production efficiency is improved; in addition, because the frequency of replacing the hollow electrode 1 is reduced, the error caused by replacing the hollow electrode 1 is greatly reduced, and the consistency of the obtained processing result is better; finally, due to the coaxial design of the electrode guide channels on the locking sealing plug 5, the locking sleeve 4 and the positioning transition sleeve 3, the accurate oil flushing of the center of the hollow electrode 1 can be ensured, the phenomenon that the unstable oil flushing in the lateral direction interferes with the chip removal process of the oil flushing of the center of the hollow electrode 1 is avoided, and the processing effect can be further improved.
As a preferred implementation manner of the embodiment of the first aspect of the present invention, referring to fig. 1, an oil pipe interface may be further disposed on the electrode holder body 6, and the oil pipe interface is connected to an oil flushing pipe of the electrical discharge machining apparatus. In practical use, the oil flushing pipe is generally connected with the oil flushing channel through the interface, so that the oil flushing pipe is conveniently connected with the oil flushing channel through the design of the oil pipe interface in the embodiment of the invention, and the connection process is simplified.
Specifically, the oil pipe interface is of a structure capable of being internally threaded. The oil pipe is characterized in that one end of the oil pipe, which is connected with the oil pipe interface, is of an external thread structure, the oil pipe interface is designed to be of an internal thread structure, the oil pipe and the oil pipe interface can be conveniently mounted and dismounted in a threaded connection mode, and the connection tightness can be guaranteed.
As another preferred implementation manner of the first embodiment of the present invention, the locking sealing plug 5 may be made of an oil-resistant rubber material, and since one end of the locking sealing plug 5 needs to be in contact with oil in the oil flushing passage, the oil-resistant material may improve the service life of the locking sealing plug 5; meanwhile, the locking sealing plug 5 is made of rubber, and when the locking sleeve 4 is locked, the locking sealing plug is flexibly connected with the locking sleeve 4 and the electrode clamp body 6, so that the sealing effect is better; the flexible connection can avoid deformation generated when the electrode clamp body 6 is in contact with the locking sleeve 4, and is beneficial to prolonging the service life of the electrode clamp disclosed by the embodiment of the invention; finally, when the hollow electrode 1 is made of rubber, after the hollow electrode 1 passes through the electrode guide channel in the hollow electrode, the locking sealing plug 5 can apply a certain fastening acting force to the hollow electrode 1 in the locking deformation process of the locking sleeve 4.
Specifically, the locking sealing plug 5 is of a conical structure, and the tip of the conical structure is plugged into a groove of the electrode clamp body 6; the bottom end of the conical structure is abutted against the locking sleeve 4. The contact surface that the recess of toper structure and electrode holder body 6 is connected is big, 4 at the lock sleeve support the pressure effect down, the toper structure can link firmly together with the recess of electrode holder body 6, and the pointed end of toper structure can the disect insertion to the front end of recess, also be exactly towards the oil passageway, can guarantee from this towards the accurate towards oil in the center of oil pipe to hollow electrode 1, avoid the unstable chip removal process that towards oil disturbs hollow electrode 1 center towards oil of side direction, can further improve the result of processing.
Specifically, as shown in fig. 2, the locking sleeve 4 is screwed to the electrode holder body 6. Can make things convenient for the installation and the dismantlement of lock sleeve 4 and electrode holder body 6 through threaded connection mode, also can keep the parallel state between lock sleeve 4 and the electrode holder body 6, when lock sleeve 4 keeps parallel with electrode holder body 6, groove structure can be filled in perpendicularly to locking sealing plug 5, can ensure that the electrode guide passageway and the lock sleeve 4 in the locking sealing plug 5, the electrode guide passageway in the transition cover 3 of location is coaxial, and then the removal of the hollow electrode 1 of being convenient for.
As another preferred embodiment of the first aspect of the present invention, the positioning transition sleeve 3 may be provided with a protruding positioning block structure for positioning the hollow electrode 1. The convex positioning block structure arranged on the positioning transition sleeve 3 can know the insertion depth when the hollow electrode 1 is inserted, so that the positions can be unified conveniently, and the consistency of processing results is facilitated.
As another preferred embodiment of the first aspect of the present invention, referring to fig. 1, the electrode clamp according to the embodiment of the present invention further includes an electrode fastening block 2, and the electrode fastening block 2 may be connected to a positioning transition sleeve 3 for fixing the hollow electrode 1. In the embodiment of the invention, the acting force of the locking sealing plug 5, the locking sleeve 4 and the positioning transition sleeve 3 for fixing the hollow electrode 1 is very weak, so that the hollow electrode 1 is easy to slide and fall off under the action of external force in the processing process, an electrode fastening block 2 is arranged at one end of the positioning transition sleeve 3, the hollow electrode 1 can be firmly and reliably fixed, and the electrode fastening block 2 can fix the hollow electrode 1 after the positioning transition sleeve 3 is accurately positioned; when the position needs to be adjusted, the electrode fastening block 2 can be adjusted to be loose, so that the hollow electrode 1 can be adjusted conveniently.
In particular, the electrode clamping block 2 and the positioning transition sleeve 3 can be connected by screws. The electrode fastening block 2 and the positioning transition sleeve 3 can be conveniently mounted and dismounted in a threaded connection mode, and the position of the hollow electrode 1 can be conveniently adjusted.
A deep small hole electric discharge machining method according to a second aspect of the embodiment of the present invention includes the electrode holder according to any one of the first aspect of the embodiment of the present invention, and a flow schematic diagram of the machining method is shown in fig. 2, where the machining method includes:
sequentially penetrating a hollow electrode 1 through an electrode guide channel and extending into an oil flushing channel of an electrode clamp body 6, clamping the electrode clamp body 6 on electric spark forming machining equipment, and communicating an oil flushing pipe with the oil flushing channel of the electrode clamp body 6;
step two, accurately positioning the hollow electrode 1 to a machining position through the positioning transition sleeve 3, calling a machining program and parameters for setting electric spark forming machining equipment, simultaneously setting oil flushing pressure of an oil flushing pipe, opening an oil flushing valve of the oil flushing pipe, and starting the electric spark forming machining equipment to realize forming machining of central oil flushing of the hollow electrode 1;
and step three, when the length loss of the hollow electrode 1 is large, pulling the hollow electrode 1 to a specified extension length along the length direction of the guide channel, and repeating the step two to continue processing.
In the embodiment of the invention, the oil flushing channel is arranged in the electrode clamp body 6 and is connected with the oil flushing pipe, the oil flushing channel is introduced into the hollow electrode 1 to realize central oil flushing, so that dust in the machining process can be brought out along with oil in time, and 'stubborn diseases' of bad chip removal in the deep small hole electric spark forming machining process in the prior art are solved, thereby greatly reducing the probability of abnormal discharge such as secondary discharge and the like caused by the dust, improving the deep small hole machining efficiency and improving the machining quality; meanwhile, in the embodiment of the invention, the electrode guide channels are sequentially arranged on the locking sealing plug 5, the locking sleeve 4 and the positioning transition sleeve 3, so that the hollow electrode 1 can be quickly replaced, flexibly adjusted and moved, and the reasonable working length of the hollow electrode 1 can be always kept in the porous processing process through the adaptive adjustment of the position of the hollow electrode 1 along the processing direction, so that the loss compensation in the processing process of the hollow electrode 1 is realized, the replacement frequency of the hollow electrode 1 is reduced, the production preparation time is saved, and the production efficiency is improved; in addition, because the frequency of replacing the hollow electrode 1 is reduced, the error caused by replacing the hollow electrode 1 is greatly reduced, and the consistency of the obtained processing result is better; finally, due to the coaxial design of the electrode guide channels on the locking sealing plug 5, the locking sleeve 4 and the positioning transition sleeve 3, the accurate oil flushing of the center of the hollow electrode 1 can be ensured, the phenomenon that the unstable oil flushing in the lateral direction interferes with the chip removal process of the oil flushing of the center of the hollow electrode 1 is avoided, and the processing effect can be further improved.
Specifically, before the hollow electrode 1 is pulled to a specified extension length, the electrode fastening block 2 connected to one end of the positioning transition sleeve 3 is loosened; the electrode fastening block 2 should be fastened after pulling the hollow electrode 1 to a specified protruding length. In the embodiment of the invention, the acting force for fixing the hollow electrode 1 by the locking sealing plug 5, the locking sleeve 4 and the positioning transition sleeve 3 is weak, so that the hollow electrode 1 is easy to slide and fall off under the action of external force in the processing process. Therefore, the electrode fastening block 2 is arranged at one end of the positioning transition sleeve 3, so that the hollow electrode 1 can be firmly and reliably fixed, and the electrode fastening block 2 can fix the hollow electrode 1 after the positioning transition sleeve 3 is accurately positioned; when the position needs to be adjusted, the electrode fastening block 2 can be adjusted to be loose, so that the hollow electrode 1 can be adjusted conveniently, and the problem that the hollow electrode 1 is easy to slide can be thoroughly solved.
It should be clear that the embodiments in this specification are described in a progressive manner, and the same or similar parts in the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. For embodiments of the method, reference is made to the description of the apparatus embodiments in part. The present invention is not limited to the specific steps and structures described above and shown in the drawings. Also, a detailed description of known process techniques is omitted herein for the sake of brevity.
The above description is only an example of the present application and is not limited to the present application. Various modifications and alterations to this application will become apparent to those skilled in the art without departing from the scope of this invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims (10)

1. The utility model provides an electrode holder for deep aperture spark-erosion machining which characterized in that includes: the electrode clamp comprises an electrode clamp body, a locking sealing plug, a locking sleeve, a positioning transition sleeve and a hollow electrode; the locking sealing plug, the locking sleeve and the positioning transition sleeve are all provided with coaxial electrode guide channels; one end of the electrode clamp body is provided with a groove structure, the locking sealing plug is plugged into the groove structure, the other end of the electrode clamp body is connected with electric spark forming machining equipment, and an oil flushing channel is arranged in an inner cavity of the electrode clamp body; the positioning transition sleeve is connected with one end of the electrode clamp body, which is positioned in the groove, and the positioning transition sleeve is connected with the locking sleeve; the hollow electrode sequentially penetrates through the positioning transition sleeve, the locking sleeve and the pole guide channel of the locking sealing plug and then extends into the oil filling channel of the electrode clamp body.
2. The electrode clamp for the electric spark forming machining of the deep small hole according to claim 1, wherein an oil pipe interface is further arranged on the electrode clamp body, and the oil pipe interface is connected with an oil flushing pipe of the electric spark forming machining equipment.
3. The electrode clamp for deep small hole electric spark forming machining according to claim 2, wherein the oil pipe interface is of an internal thread structure.
4. The electrode clamp for deep small hole electric spark forming machining according to claim 1, wherein the locking sealing plug is made of oil-resistant rubber.
5. The electrode clamp for the deep small hole electric spark forming machining according to claim 1 or 4, wherein the locking sealing plug is of a conical structure, and the tip of the conical structure is plugged into the groove of the electrode clamp body; the bottom end of the conical structure is abutted against the locking sleeve.
6. The electrode clamp for deep small hole electric spark forming machining according to claim 1, wherein the locking sleeve is connected with the electrode clamp body through threads.
7. The electrode clamp for deep small hole electric spark forming machining according to claim 1, wherein a protruding positioning block structure for positioning the hollow electrode is arranged on the positioning transition sleeve.
8. The electrode clamp for the electric spark forming machining of the deep small hole according to claim 1, further comprising an electrode fastening block, wherein the electrode fastening block is connected with the positioning transition sleeve through a screw and used for fixing the hollow electrode.
9. A deep small hole electric discharge machining method using the electrode holder according to any one of claims 1 to 8, comprising:
sequentially penetrating the hollow electrode through the electrode guide channel and extending into an oil flushing channel of the electrode clamp body, clamping the electrode clamp body on electric spark forming machining equipment, and communicating an oil flushing pipe with the oil flushing channel of the electrode clamp body;
secondly, accurately positioning the hollow electrode to a machining position through the positioning transition sleeve, calling a machining program and parameters for setting electric spark forming machining equipment, simultaneously setting oil flushing pressure of an oil flushing pipe, opening an oil flushing valve of the oil flushing pipe, and starting the electric spark forming machining equipment to realize forming machining of central oil flushing of the hollow electrode;
and step three, when the length loss of the hollow electrode is large, pulling the hollow electrode to a specified extension length along the length direction of the guide channel, and repeating the step two to continue processing.
10. The deep small hole electric spark forming processing method as claimed in claim 9, wherein before pulling the hollow electrode to a specified extension length, the electrode fastening block connected to one end of the positioning transition sleeve should be released; the electrode fastening block should be tightened after the hollow electrode is pulled to a specified extension length.
CN201911162899.6A 2019-11-22 2019-11-22 Electrode clamp for deep small hole electric spark forming machining and machining method Pending CN110860747A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911162899.6A CN110860747A (en) 2019-11-22 2019-11-22 Electrode clamp for deep small hole electric spark forming machining and machining method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911162899.6A CN110860747A (en) 2019-11-22 2019-11-22 Electrode clamp for deep small hole electric spark forming machining and machining method

Publications (1)

Publication Number Publication Date
CN110860747A true CN110860747A (en) 2020-03-06

Family

ID=69656304

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911162899.6A Pending CN110860747A (en) 2019-11-22 2019-11-22 Electrode clamp for deep small hole electric spark forming machining and machining method

Country Status (1)

Country Link
CN (1) CN110860747A (en)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2044526U (en) * 1988-05-24 1989-09-20 西北工业大学1008教研室 Gds-type high-speed electric spark apparatus for processing deep hole
CN2221464Y (en) * 1994-12-13 1996-03-06 山东工程学院 Sealed quick-changing electrode holder
US20060289392A1 (en) * 2005-06-24 2006-12-28 Tai-I Electron Machining Co., Ltd. Method and Apparatus for Clamping an Electrode Tube in EDM Drill Equipment
CN201091948Y (en) * 2007-10-24 2008-07-30 广东轻工职业技术学院 Self-guided composite material tube electrode and electric spark deep eyelet processing device thereof
CN101774051A (en) * 2010-02-22 2010-07-14 西北工业大学 Inclined hole electrosparking processing device and method for adjusting position and angle of electrode
CN101890547A (en) * 2010-08-06 2010-11-24 上海交通大学 Clustered shaped electrode holding device
CN103273153A (en) * 2013-05-23 2013-09-04 烟台大学 Self-clamping dynamic sealing device capable of feeding electrode wires in wriggled mode
CN103769705A (en) * 2014-01-17 2014-05-07 清华大学 Multi-functional spindle mechanism used for small deep holes electrical discharge machining
CN105195842A (en) * 2015-11-06 2015-12-30 山东理工大学 Electrolyte sealing device for tubular electrode electrolytic machining
CN105618872A (en) * 2016-01-22 2016-06-01 安徽理工大学 High-speed rotation tool electrode electromachining equipment driven by Tesla turbine
CN206779629U (en) * 2017-05-16 2017-12-22 无锡微研股份有限公司 Clamp the rotary sealing mechanism of different-diameter hollow tube-shaped electrode silk
CN209379359U (en) * 2018-11-28 2019-09-13 河南理工大学 The compound Ultrasonic machining system of multi-dimensional vibration with interior refrigerating function

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2044526U (en) * 1988-05-24 1989-09-20 西北工业大学1008教研室 Gds-type high-speed electric spark apparatus for processing deep hole
CN2221464Y (en) * 1994-12-13 1996-03-06 山东工程学院 Sealed quick-changing electrode holder
US20060289392A1 (en) * 2005-06-24 2006-12-28 Tai-I Electron Machining Co., Ltd. Method and Apparatus for Clamping an Electrode Tube in EDM Drill Equipment
CN201091948Y (en) * 2007-10-24 2008-07-30 广东轻工职业技术学院 Self-guided composite material tube electrode and electric spark deep eyelet processing device thereof
CN101774051A (en) * 2010-02-22 2010-07-14 西北工业大学 Inclined hole electrosparking processing device and method for adjusting position and angle of electrode
CN101890547A (en) * 2010-08-06 2010-11-24 上海交通大学 Clustered shaped electrode holding device
CN103273153A (en) * 2013-05-23 2013-09-04 烟台大学 Self-clamping dynamic sealing device capable of feeding electrode wires in wriggled mode
CN103769705A (en) * 2014-01-17 2014-05-07 清华大学 Multi-functional spindle mechanism used for small deep holes electrical discharge machining
CN105195842A (en) * 2015-11-06 2015-12-30 山东理工大学 Electrolyte sealing device for tubular electrode electrolytic machining
CN105618872A (en) * 2016-01-22 2016-06-01 安徽理工大学 High-speed rotation tool electrode electromachining equipment driven by Tesla turbine
CN206779629U (en) * 2017-05-16 2017-12-22 无锡微研股份有限公司 Clamp the rotary sealing mechanism of different-diameter hollow tube-shaped electrode silk
CN209379359U (en) * 2018-11-28 2019-09-13 河南理工大学 The compound Ultrasonic machining system of multi-dimensional vibration with interior refrigerating function

Similar Documents

Publication Publication Date Title
CN105171158B (en) A kind of turborotor taper air film hole processing technology
CN103433576B (en) A kind of self-induction-Nei of insulative ceramic coatings metal rushes liquid electric discharge machining method
CN108213624B (en) A kind of tool and method of electric-spark drilling and reaming Compound Machining elongated hole
CN108480804A (en) Small size inner wall annular groove Electrolyzed Processing cathode and its application method
CN110860747A (en) Electrode clamp for deep small hole electric spark forming machining and machining method
US5073690A (en) Long lasting electrical discharge machine wire guide
CN104842182A (en) Novel supersonic machining tool chuck
US3849271A (en) Electrochemical drilling
CN209223336U (en) A kind of spark-erosion perforating machine electrode clamping device
CN211192376U (en) Electrode device for die machining
CN110280857B (en) Electrolytic machining clamp and machining process for bidirectional inverted taper hole group of oil nozzle
CN209110343U (en) Sandwich-type cathode assembly and cathode group hole Electrolyzed Processing frock clamp
CN210731122U (en) Drilling tool
CN112518060A (en) Special-shaped hole electric spark machining clamp and method
CN208304086U (en) A kind of cathode construction of the Electrolyzed Processing for small size inner wall annular groove
US3919515A (en) Electrode holder for EDM
CN201776526U (en) Composite cutting tool for processing guide tube bottom hole and seat ring bottom hole of cylinder cover
CN110732849B (en) Electric spark machining method for through hole in inner wall of cavity of thin-wall metal plate welding structural part
CN213888218U (en) Combined tool for machining high-precision small-diameter pin hole
CN109834377B (en) Tungsten needle positioner that screw thread was adjusted
CN210450021U (en) Compressor cleaning tool of turbofan engine
CN209857056U (en) Acetylene cutting torch for machine
CN213034126U (en) LM2500 is machining frock for fuel injector
CN208663301U (en) Adjustable gland sealing ring boring and milling looks for middle tool on a kind of steam turbine
CN210281386U (en) Cutter clamping device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination